Autoxidation of extracellular hydroquinones is a causative event for the cytotoxicity of menadione and DMNQ in A549-S cells

N Watanabe, HJ Forman - Archives of Biochemistry and Biophysics, 2003 - Elsevier
Cytotoxicity of 1, 4-naphthoquinones has been attributed to intracellular reactive oxygen
species (ROS) generation through one-electron-reductase-mediated redox cycling and to …

NAD (P) H: quinone oxidoreductase 1: role as a superoxide scavenger

D Siegel, DL Gustafson, DL Dehn, JY Han… - Molecular …, 2004 - ASPET
Experiments using purified recombinant human NAD (P) H: quinone oxidoreductase 1
(NQO1) revealed that the auto-oxidation of fully reduced protein resulted in a 1: 1 …

Quinone toxicity in hepatocytes without oxidative stress

L Rossi, GA Moore, S Orrenius, PJ O'Brien - Archives of Biochemistry and …, 1986 - Elsevier
The toxicity of quinones is believed to be mediated via redox cycling involving formation of
semiquinone radicals which autoxidize to form active oxygen species. However, when the …

Redox cycling and sulphydryl arylation; their relative importance in the mechanism of quinone cytotoxicity to isolated hepatocytes

TW Gant, DNR Rao, RP Mason, GM Cohen - Chemico-biological …, 1988 - Elsevier
Quinones are believed to be toxic by a mechanism involving redox cycling and oxidative
stress. In this study, we have used 2, 3-dimethoxy-1, 4-naphthoquinone (2, 3-diOMe-1, 4 …

Nitroxides as antioxidants: Tempol protects against E09 cytotoxicity

AM Samuni, W DeGraff, MC Krishna… - Oxygen/Nitrogen Radicals …, 2002 - Springer
Nitroxide free radicals have been shown to be potent antioxidants in a variety of
experimental models using diverse means of insults. Among other insults, nitroxides have …

Interconversion of NAD (H) to NADP (H): A cellular response to quinone-induced oxidative stress in isolated hepatocytes

CR Stubberfield, GM Cohen - Biochemical pharmacology, 1989 - Elsevier
Quinones may be toxic by a number of mechanisms, including oxidative stress caused by
redox cycling and arylation. This study has compared the cytotoxicity of four quinones, with …

NRH: quinone oxidoreductase 2 (NQO2) catalyzes metabolic activation of quinones and anti-tumor drugs

CM Celli, N Tran, R Knox, AK Jaiswal - Biochemical pharmacology, 2006 - Elsevier
NRH: quinone oxidoreductase 2 (NQO2) is a cytosolic flavoprotein that utilizes NRH as
electron donor. The present studies investigate the role of NQO2 in metabolic detoxification …

Formation and biological targets of quinones: cytotoxic versus cytoprotective effects

JL Bolton, T Dunlap - Chemical research in toxicology, 2017 - ACS Publications
Quinones represent a class of toxicological intermediates, which can create a variety of
hazardous effects in vivo including, acute cytotoxicity, immunotoxicity, and carcinogenesis …

A physiological threshold for protection against menadione toxicity by human NAD (P) H: quinone oxidoreductase (NQO1) in Chinese hamster ovary (CHO) cells

LHJ De Haan, AMJF Boerboom, IMCM Rietjens… - Biochemical …, 2002 - Elsevier
NAD (P) H: quinone oxidoreductase 1 (NQO1) has often been suggested to be involved in
cancer prevention by means of detoxification of electrophilic quinones. In the present study …

The chemical biology of naphthoquinones and its environmental implications

Y Kumagai, Y Shinkai, T Miura… - Annual review of …, 2012 - annualreviews.org
Quinones are a group of highly reactive organic chemical species that interact with
biological systems to promote inflammatory, anti-inflammatory, and anticancer actions and to …